Neuromagnetic speech discrimination responses are associated with reading-related skills in dyslexic and typical readers

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Thiede , A , Parkkonen , L , Virtala , P , Laasonen , M , Makela , J P & Kujala , T 2020 , ' Neuromagnetic speech discrimination responses are associated with reading-related skills in dyslexic and typical readers ' , Heliyon , vol. 6 , no. 8 , 04619 . https://doi.org/10.1016/j.heliyon.2020.e04619

Title: Neuromagnetic speech discrimination responses are associated with reading-related skills in dyslexic and typical readers
Author: Thiede, A.; Parkkonen, L.; Virtala, P.; Laasonen, M.; Makela, J. P.; Kujala, T.
Other contributor: University of Helsinki, DyslexiaBaby
University of Helsinki, Department of Psychology and Logopedics
University of Helsinki, Department of Psychology and Logopedics
University of Helsinki, HUS Medical Imaging Center
University of Helsinki, Department of Psychology and Logopedics








Date: 2020-08
Language: eng
Number of pages: 12
Belongs to series: Heliyon
ISSN: 2405-8440
DOI: https://doi.org/10.1016/j.heliyon.2020.e04619
URI: http://hdl.handle.net/10138/322131
Abstract: Poor neural speech discrimination has been connected to dyslexia, and may represent phonological processing deficits that are hypothesized to be the main cause for reading impairments. Thus far, neural speech discrimination impairments have rarely been investigated in adult dyslexics, and even less by examining sources of neuromagnetic responses. We compared neuromagnetic speech discrimination in dyslexic and typical readers with mismatch fields (MMF) and determined the associations between MMFs and reading-related skills. We expected weak and atypically lateralized MMFs in dyslexic readers, and positive associations between readingrelated skills and MMF strength. MMFs were recorded to a repeating pseudoword /ta-ta/ with occasional changes in vowel identity, duration, or syllable frequency from 43 adults, 21 with confirmed dyslexia. Phonetic (vowel and duration) changes elicited left-lateralized MMFs in the auditory cortices. Contrary to our hypothesis, MMF source strengths or lateralization did not differ between groups. However, better verbal working memory was associated with stronger left-hemispheric MMFs to duration changes across groups, and better reading was associated with stronger right-hemispheric late MMFs across speech-sound changes in dyslexic readers. This suggests a link between neural speech processing and reading-related skills, in line with previous work. Furthermore, our findings suggest a right-hemispheric compensatory mechanism for language processing in dyslexia. The results obtained promote the use of MMFs in investigating reading-related brain processes.
Subject: 515 Psychology
Dyslexia
Magnetoencephalography (MEG)
Speech processing
Mismatch field (MMF)
Reading skills
Verbal working memory
Behavioral neuroscience
Cognitive neuroscience
Applied linguistics
Clinical psychology
Cognitive psychology
EVENT-RELATED POTENTIALS
MISMATCH NEGATIVITY MMN
AUDITORY SENSORY MEMORY
DEVELOPMENTAL DYSLEXIA
WORKING-MEMORY
FREQUENCY DISCRIMINATION
PHONEME REPRESENTATIONS
BRAIN RESPONSES
SCHOOL-CHILDREN
FAMILIAL RISK
6162 Cognitive science
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